Black nylon waist bag with reflectors, easy to use with an adjustable strap. I haven't been using it because my smartphone fits too snugly and is difficult to take out. There are images (images 9-10) showing the external dimensions, so I think a smartphone that is about 1-2cm smaller in length and width would be suitable. It has some stretch, but no gusset. Running, cycling, hiking Fitness use, multi-pocket design - Color: Black - Material: Nylon - Strap: Adjustable with buckle - Pocket: Zippered pocket - Design: With reflectors Thank you for viewing.